Malicious PDF — malware analysis report

Static analysis result for SHA-256 309b3ffa24e1d3da…

MALICIOUS

PDF

37.5 KB Created: 2020-04-10 06:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b502baa983709c3deb03232882babc8f SHA-1: 540ec3a7e83e2917185f0931fbfddf3bd7d5754d SHA-256: 309b3ffa24e1d3da454a9dc875684bb32020db622d5933be99fc544ec9f0eeae
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports this. The document body itself is largely unreadable but contains references to the external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://settenove.info/uploads/1/3/0/6/130620402/130620402.html#robert+gagne+conditions+of+learning
    • http://dakotaplayers.com/uploads/1/3/0/5/130539113/wazovo.pdf
    • http://rocketleaguerewards.net/uploads/1/3/1/4/131437891/fiwuvadigal.pdf
    • http://readynetwork-beprepared.com/uploads/1/3/1/4/131454986/nutuwefiwujo_muvedodu_funonil.pdf
    • http://pennsylvanialifeinsuranceattorney.com/uploads/1/3/0/5/130588370/kadolege-jogegorumudaze-wivekuwo.pdf
    • http://caldersautocenter.com/uploads/1/3/1/1/131164315/1829795.pdf
    • http://ryohoinc.com/uploads/1/3/0/8/130873781/6af9ecbe775d829.pdf
    • http://cakeballstogo.com/uploads/1/3/0/6/130639197/butoki-sogatemawuwulen-mezijazazusar-dojibabadusa.pdf
    • http://tiki-boum.com/uploads/1/3/1/4/131406108/df000da7c22.pdf
    • http://fresnocatering4u.com/uploads/1/3/1/0/131070500/4567708.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a28.bin
7ead9caa31206f08051300087f9f9f63b2afd2a1efb3e8a4d948997652836846		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A28 8076 bytes

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